Xilinx Spartan-3E User Manual

Spartan-3E Starter Kit Board User Guide www.xilinx.com 71
UG230 (v1.0) March 9, 2006
UCF Location Constraints
R
UCF Location Constraints
Figure 9-5 provides the UCF constraints for the DAC interface, including the I/O pin
assignment and the I/O standard used.
Related Resources
• LTC2624 Quad DAC Data Sheet
http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1155,C1005,C1156,P2048,D2170
• PicoBlaze Based D/A Converter Control for the Spartan-3E Starter Kit (Reference
Design)
http://www.xilinx.com/s3estarter
• Xilinx PicoBlaze Soft Processor
http://www.xilinx.com/picoblaze
• Digilent, Inc. Peripheral Modules
http://www.digilentinc.com/Products/Catalog.cfm?Nav1=Products&Nav2=Peripheral&Cat=Peripheral
Figure 9-5: UCF Location Constraints for the DAC Interface
NET "SPI_MISO" LOC = "N10" | IOSTANDARD = LVCMOS33 ;
NET "SPI_MOSI" LOC = "T4" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "SPI_SCK" LOC = "U16" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "DAC_CS" LOC = "N8" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;
NET "DAC_CLR" LOC = "P8" | IOSTANDARD = LVCMOS33 | SLEW = SLOW | DRIVE = 8 ;

Xilinx Spartan-3E Specifications

General

Brand	Xilinx
Model	Spartan-3E
Category	Motherboard
Language	English